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Finding the Fourth Proportional to 79,511.58, 109,728 and 43,702.50

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Solution

The fourth proportional to 79,511.58, 109,728 and 43,702.50 is: 60,310.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,511.58 : 109,728 = 43,702.50 : x
  2. Step 2: Convert to fraction form
    79,511.58/109,728 = 43,702.50/x
  3. Step 3: Cross multiply
    79,511.58x = 109,728 × 43,702.50
  4. Step 4: Simplify right side
    79,511.58x = 4,795,387,920
  5. Step 5: Solve for x
    x = 4,795,387,920/79,511.58
  6. Step 6: Final answer
    x = 60,310.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.